Create UI assets from existing PSD for iOS application

I have PSD Mockups of an iOS app that need the User Interface elements extracted as separate PNG's (such as boxes, icons, etc.). This does not include fonts and navigation elements. The extracted elements should conform to this guideline from Apple: Instructions: Go through each PSD Create a folder with the same filename as the PSD (example: User Dashboard-UI-PSD Create UI elements in three sizes: example: if a file is a clock icon and needs to be displayed on various iPhone sizes, the filenames should be as follows: 15px * 15px = clock (at)[login to view URL] (smallest size) 30px * 30px = clock(at)[login to view URL] (medium size) 45 px * 45 px = clock( at ) [login to view URL] (largest size) Note: There are no brackets or spaces in the filename. The word at will be replace with the @ symbol. Freelancer looks at this as an attempt to send an email. Please see attachment for example of sizes and image naming convention.